package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.constant.RedisConstant;
import com.atguigu.lease.common.exception.LeaseException;
import com.atguigu.lease.common.result.ResultCodeEnum;
import com.atguigu.lease.common.utils.JwtUtil;
import com.atguigu.lease.model.entity.SystemUser;
import com.atguigu.lease.model.enums.BaseStatus;
import com.atguigu.lease.web.admin.mapper.SystemUserMapper;
import com.atguigu.lease.web.admin.service.LoginService;
import com.atguigu.lease.web.admin.service.SystemUserService;
import com.atguigu.lease.web.admin.vo.login.CaptchaVo;
import com.atguigu.lease.web.admin.vo.login.LoginVo;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.wf.captcha.SpecCaptcha;
import org.apache.commons.codec.digest.DigestUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.UUID;
import java.util.concurrent.TimeUnit;

@Service
public class LoginServiceImpl implements LoginService {
  @Autowired
  private StringRedisTemplate redisTemplate;
  @Autowired
  private SystemUserMapper systemUserMapper;
    /*
    *  easy-captcha-> 生成图形验证码的方法
    * */
    @Override
    public CaptchaVo getCaptcha() {
        //图片对象specCaptcha (设置图片的样式)
        SpecCaptcha specCaptcha = new SpecCaptcha(130, 48, 4);
        //验证码
        String verCode = specCaptcha.text().toLowerCase();

        //redis保存verCode验证码
        String key= RedisConstant.ADMIN_LOGIN_PREFIX +UUID.randomUUID();
        redisTemplate.opsForValue().set(key,verCode,RedisConstant.ADMIN_LOGIN_CAPTCHA_TTL_SEC, TimeUnit.SECONDS);


        //把图形验证码,和redis保存验证码的key进行封装
        CaptchaVo captchaVo=new CaptchaVo(specCaptcha.toBase64(), key);
        return captchaVo;

    }

    @Override
    public String login(LoginVo loginVo) {
        String captchaCode = loginVo.getCaptchaCode(); //验证码

        if (!StringUtils.hasText(captchaCode)){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_NOT_FOUND);
        }
        //获取redis中的验证码
        String redisCode = redisTemplate.opsForValue().get(loginVo.getCaptchaKey());
        if(redisCode == null){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_EXPIRED);
        }
        //比较验证码输入是否正确
        if (!captchaCode.equals(redisCode)){
            throw new LeaseException(ResultCodeEnum.ADMIN_CAPTCHA_CODE_ERROR);
        }
        //根据账号查询数据库用户的信息
        SystemUser systemUser = systemUserMapper.selectOne(new LambdaQueryWrapper<SystemUser>().eq(SystemUser::getUsername, loginVo.getUsername()));
        if (systemUser == null){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_NOT_EXIST_ERROR);
        }

        //判断账号是否被禁用
        if (systemUser.getStatus() == BaseStatus.DISABLE){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_DISABLED_ERROR);
        }

        //比较密码是否一致
        if (!systemUser.getPassword().equals(DigestUtils.md5Hex(loginVo.getPassword()))){
            throw new LeaseException(ResultCodeEnum.ADMIN_ACCOUNT_ERROR);
        }

        //登录成功,生成token
        String token = JwtUtil.createToken(systemUser.getUsername(), systemUser.getId());


        return token;
    }
}
